Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Due to the increased burning of fossil fuels, atmospheric CO2 is increasing.

- CO2 warms the Earth’s surface by trapping heat in the

atmosphere. - This is called the greenhouse effect

Human Activity is Causing Global Warming;Photosynthesis Attempts to Moderate It.

ATMOSPHERE

Radiant heat trapped by CO2 and other gases

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Because photosynthesis removes CO2 from the atmosphere, it helps to moderate the greenhouse effect.- Unfortunately, deforestation may cause a decline in global

photosynthesis.

Atmospheric Carbon Dioxide ConcentrationsThe Concentrations of Carbon Dioxide in the atmosphere fluctuates between winter and summer because of seasonal variation in photosynthesis. The average concentration is increasing owing to human activities – in particular, burning fossil fuels and deforestation (All measurements made from Hawaii).

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Global Carbon Cycle

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

BIO 141 Botany with Laboratory

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